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Database query functions for TaskSwap\n\nimport { sqlite } from \"https://esm.town/v/stevekrouse/sqlite\";\nimport type { User, Task, Message, Exchange, CreateTaskRequest, CreateUserRequest } from \"../../shared/types.ts\";\n\n// User queries\nexport async function createUser(userData: CreateUserRequest & { password_hash: string }): Promise {\n const result = await sqlite.execute(`\n INSERT INTO users (username, email, password_hash, full_name, bio, skills)\n VALUES (?, ?, ?, ?, ?, ?)\n `, [\n userData.username,\n userData.email,\n userData.password_hash,\n userData.full_name,\n userData.bio || null,\n JSON.stringify(userData.skills)\n ]);\n\n return getUserById(result.lastInsertRowid as number);\n}\n\nexport async function getUserById(id: number): Promise {\n const result = await sqlite.execute('SELECT * FROM users WHERE id = ?', [id]);\n if (result.length === 0) throw new Error('User not found');\n \n const user = result[0];\n return {\n ...user,\n skills: JSON.parse(user.skills),\n avatar_url: user.avatar_url || `https://ui-avatars.com/api/?name=${encodeURIComponent(user.username)}&background=0D9488&color=fff&size=128`\n } as User;\n}\n\nexport async function getUserByEmail(email: string): Promise {\n const result = await sqlite.execute('SELECT * FROM users WHERE email = ?', [email]);\n if (result.length === 0) return null;\n \n const user = result[0];\n return {\n ...user,\n skills: JSON.parse(user.skills),\n avatar_url: user.avatar_url || `https://ui-avatars.com/api/?name=${encodeURIComponent(user.username)}&background=0D9488&color=fff&size=128`\n } as User;\n}\n\nexport async function getUserByUsername(username: string): Promise {\n const result = await sqlite.execute('SELECT * FROM users WHERE username = ?', [username]);\n if (result.length === 0) return null;\n \n const user = result[0];\n return {\n ...user,\n skills: JSON.parse(user.skills),\n avatar_url: user.avatar_url || `https://ui-avatars.com/api/?name=${encodeURIComponent(user.username)}&background=0D9488&color=fff&size=128`\n } as User;\n}\n\nexport async function updateUserTokens(userId: number, tokenChange: number): Promise {\n await sqlite.execute(`\n UPDATE users \n SET tokens = tokens + ?, updated_at = CURRENT_TIMESTAMP \n WHERE id = ?\n `, [tokenChange, userId]);\n}\n\nexport async function updateUserRating(userId: number, newRating: number): Promise {\n await sqlite.execute(`\n UPDATE users \n SET rating = ?, total_completed = total_completed + 1, updated_at = CURRENT_TIMESTAMP \n WHERE id = ?\n `, [newRating, userId]);\n}\n\n// Task queries\nexport async function createTask(taskData: CreateTaskRequest, creatorId: number): Promise {\n const tokenCost = calculateTokenCost(taskData.difficulty, taskData.estimated_hours);\n \n const result = await sqlite.execute(`\n INSERT INTO tasks (title, description, category, difficulty, token_cost, required_skills, estimated_hours, creator_id, deadline)\n VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)\n `, [\n taskData.title,\n taskData.description,\n taskData.category,\n taskData.difficulty,\n tokenCost,\n JSON.stringify(taskData.required_skills),\n taskData.estimated_hours,\n creatorId,\n taskData.deadline || null\n ]);\n\n return getTaskById(result.lastInsertRowid as number);\n}\n\nexport async function getTaskById(id: number): Promise {\n const result = await sqlite.execute(`\n SELECT t.*, \n c.username as creator_username, c.full_name as creator_name, c.avatar_url as creator_avatar,\n a.username as assignee_username, a.full_name as assignee_name, a.avatar_url as assignee_avatar\n FROM tasks t\n LEFT JOIN users c ON t.creator_id = c.id\n LEFT JOIN users a ON t.assignee_id = a.id\n WHERE t.id = ?\n `, [id]);\n \n if (result.length === 0) throw new Error('Task not found');\n \n const task = result[0];\n return {\n ...task,\n required_skills: JSON.parse(task.required_skills),\n creator: task.creator_username ? {\n id: task.creator_id,\n username: task.creator_username,\n full_name: task.creator_name,\n avatar_url: task.creator_avatar || `https://ui-avatars.com/api/?name=${encodeURIComponent(task.creator_username)}&background=0D9488&color=fff&size=128`\n } : undefined,\n assignee: task.assignee_username ? {\n id: task.assignee_id,\n username: task.assignee_username,\n full_name: task.assignee_name,\n avatar_url: task.assignee_avatar || `https://ui-avatars.com/api/?name=${encodeURIComponent(task.assignee_username)}&background=0D9488&color=fff&size=128`\n } : undefined\n } as Task;\n}\n\nexport async function getTasks(filters: {\n category?: string;\n difficulty?: string;\n status?: string;\n creatorId?: number;\n assigneeId?: number;\n search?: string;\n limit?: number;\n offset?: number;\n} = {}): Promise {\n let query = `\n SELECT t.*, \n c.username as creator_username, c.full_name as creator_name, c.avatar_url as creator_avatar,\n a.username as assignee_username, a.full_name as assignee_name, a.avatar_url as assignee_avatar\n FROM tasks t\n LEFT JOIN users c ON t.creator_id = c.id\n LEFT JOIN users a ON t.assignee_id = a.id\n WHERE 1=1\n `;\n \n const params: any[] = [];\n \n if (filters.category) {\n query += ' AND t.category = ?';\n params.push(filters.category);\n }\n \n if (filters.difficulty) {\n query += ' AND t.difficulty = ?';\n params.push(filters.difficulty);\n }\n \n if (filters.status) {\n query += ' AND t.status = ?';\n params.push(filters.status);\n }\n \n if (filters.creatorId) {\n query += ' AND t.creator_id = ?';\n params.push(filters.creatorId);\n }\n \n if (filters.assigneeId) {\n query += ' AND t.assignee_id = ?';\n params.push(filters.assigneeId);\n }\n \n if (filters.search) {\n query += ' AND (t.title LIKE ? OR t.description LIKE ?)';\n const searchTerm = `%${filters.search}%`;\n params.push(searchTerm, searchTerm);\n }\n \n query += ' ORDER BY t.created_at DESC';\n \n if (filters.limit) {\n query += ' LIMIT ?';\n params.push(filters.limit);\n \n if (filters.offset) {\n query += ' OFFSET ?';\n params.push(filters.offset);\n }\n }\n \n const result = await sqlite.execute(query, params);\n \n return result.map(task => ({\n ...task,\n required_skills: JSON.parse(task.required_skills),\n creator: task.creator_username ? {\n id: task.creator_id,\n username: task.creator_username,\n full_name: task.creator_name,\n avatar_url: task.creator_avatar || `https://ui-avatars.com/api/?name=${encodeURIComponent(task.creator_username)}&background=0D9488&color=fff&size=128`\n } : undefined,\n assignee: task.assignee_username ? {\n id: task.assignee_id,\n username: task.assignee_username,\n full_name: task.assignee_name,\n avatar_url: task.assignee_avatar || `https://ui-avatars.com/api/?name=${encodeURIComponent(task.assignee_username)}&background=0D9488&color=fff&size=128`\n } : undefined\n })) as Task[];\n}\n\nexport async function updateTaskStatus(taskId: number, status: string, assigneeId?: number): Promise {\n if (assigneeId) {\n await sqlite.execute(`\n UPDATE tasks \n SET status = ?, assignee_id = ?, updated_at = CURRENT_TIMESTAMP \n WHERE id = ?\n `, [status, assigneeId, taskId]);\n } else {\n await sqlite.execute(`\n UPDATE tasks \n SET status = ?, updated_at = CURRENT_TIMESTAMP \n WHERE id = ?\n `, [status, taskId]);\n }\n}\n\n// Message queries\nexport async function createMessage(senderId: number, receiverId: number, taskId: number, content: string): Promise {\n const result = await sqlite.execute(`\n INSERT INTO messages (sender_id, receiver_id, task_id, content)\n VALUES (?, ?, ?, ?)\n `, [senderId, receiverId, taskId, content]);\n\n return getMessageById(result.lastInsertRowid as number);\n}\n\nexport async function getMessageById(id: number): Promise {\n const result = await sqlite.execute(`\n SELECT m.*, \n s.username as sender_username, s.full_name as sender_name, s.avatar_url as sender_avatar,\n r.username as receiver_username, r.full_name as receiver_name, r.avatar_url as receiver_avatar\n FROM messages m\n LEFT JOIN users s ON m.sender_id = s.id\n LEFT JOIN users r ON m.receiver_id = r.id\n WHERE m.id = ?\n `, [id]);\n \n if (result.length === 0) throw new Error('Message not found');\n \n const message = result[0];\n return {\n ...message,\n sender: {\n id: message.sender_id,\n username: message.sender_username,\n full_name: message.sender_name,\n avatar_url: message.sender_avatar || `https://ui-avatars.com/api/?name=${encodeURIComponent(message.sender_username)}&background=0D9488&color=fff&size=128`\n },\n receiver: {\n id: message.receiver_id,\n username: message.receiver_username,\n full_name: message.receiver_name,\n avatar_url: message.receiver_avatar || `https://ui-avatars.com/api/?name=${encodeURIComponent(message.receiver_username)}&background=0D9488&color=fff&size=128`\n }\n } as Message;\n}\n\nexport async function getTaskMessages(taskId: number): Promise {\n const result = await sqlite.execute(`\n SELECT m.*, \n s.username as sender_username, s.full_name as sender_name, s.avatar_url as sender_avatar,\n r.username as receiver_username, r.full_name as receiver_name, r.avatar_url as receiver_avatar\n FROM messages m\n LEFT JOIN users s ON m.sender_id = s.id\n LEFT JOIN users r ON m.receiver_id = r.id\n WHERE m.task_id = ?\n ORDER BY m.created_at ASC\n `, [taskId]);\n \n return result.map(message => ({\n ...message,\n sender: {\n id: message.sender_id,\n username: message.sender_username,\n full_name: message.sender_name,\n avatar_url: message.sender_avatar || `https://ui-avatars.com/api/?name=${encodeURIComponent(message.sender_username)}&background=0D9488&color=fff&size=128`\n },\n receiver: {\n id: message.receiver_id,\n username: message.receiver_username,\n full_name: message.receiver_name,\n avatar_url: message.receiver_avatar || `https://ui-avatars.com/api/?name=${encodeURIComponent(message.receiver_username)}&background=0D9488&color=fff&size=128`\n }\n })) as Message[];\n}\n\n// Exchange queries\nexport async function createExchange(taskId: number, creatorId: number, assigneeId: number): Promise {\n const result = await sqlite.execute(`\n INSERT INTO exchanges (task_id, creator_id, assignee_id, status)\n VALUES (?, ?, ?, 'pending')\n `, [taskId, creatorId, assigneeId]);\n\n return getExchangeById(result.lastInsertRowid as number);\n}\n\nexport async function getExchangeById(id: number): Promise {\n const result = await sqlite.execute('SELECT * FROM exchanges WHERE id = ?', [id]);\n if (result.length === 0) throw new Error('Exchange not found');\n return result[0] as Exchange;\n}\n\nexport async function updateExchangeStatus(exchangeId: number, status: string): Promise {\n const completedAt = status === 'completed' ? new Date().toISOString() : null;\n \n await sqlite.execute(`\n UPDATE exchanges \n SET status = ?, completed_at = ?\n WHERE id = ?\n `, [status, completedAt, exchangeId]);\n}\n\nexport async function addExchangeRating(exchangeId: number, isCreator: boolean, rating: number, feedback?: string): Promise {\n if (isCreator) {\n await sqlite.execute(`\n UPDATE exchanges \n SET creator_rating = ?, creator_feedback = ?\n WHERE id = ?\n `, [rating, feedback || null, exchangeId]);\n } else {\n await sqlite.execute(`\n UPDATE exchanges \n SET assignee_rating = ?, assignee_feedback = ?\n WHERE id = ?\n `, [rating, feedback || null, exchangeId]);\n }\n}\n\n// Session management\nexport async function createSession(userId: number): Promise {\n const sessionId = crypto.randomUUID();\n const expiresAt = new Date(Date.now() + 7 * 24 * 60 * 60 * 1000); // 7 days\n \n await sqlite.execute(`\n INSERT INTO sessions (id, user_id, expires_at)\n VALUES (?, ?, ?)\n `, [sessionId, userId, expiresAt.toISOString()]);\n \n return sessionId;\n}\n\nexport async function getSessionUser(sessionId: string): Promise {\n const result = await sqlite.execute(`\n SELECT u.* FROM users u\n JOIN sessions s ON u.id = s.user_id\n WHERE s.id = ? AND s.expires_at > CURRENT_TIMESTAMP\n `, [sessionId]);\n \n if (result.length === 0) return null;\n \n const user = result[0];\n return {\n ...user,\n skills: JSON.parse(user.skills),\n avatar_url: user.avatar_url || `https://ui-avatars.com/api/?name=${encodeURIComponent(user.username)}&background=0D9488&color=fff&size=128`\n } as User;\n}\n\nexport async function deleteSession(sessionId: string): Promise {\n await sqlite.execute('DELETE FROM sessions WHERE id = ?', [sessionId]);\n}\n\n// Utility functions\nfunction calculateTokenCost(difficulty: string, estimatedHours: number): number {\n const baseRates = {\n easy: 2,\n medium: 3,\n hard: 5\n };\n \n const rate = baseRates[difficulty as keyof typeof baseRates] || 2;\n return Math.max(1, Math.round(rate * (estimatedHours / 2)));\n}","deleted","label",[169,170,151],"backend","database","permalink","https://www.val.town/x/vishuu6969696969/taskswap/code/backend/database/queries.ts","extension","actionData","errors"]